A motor vehicle has a front engine compartment housing a powertrain unit and at least one side-member on which a safety device is mounted; the safety device is configured so as to move said powertrain unit sideways during an impact, towards the opposite side to that which is subject to the impact; the safety device is provided with a beam having a first end, spaced from a terminal portion of the side-member towards the outside of the engine compartment, and a second end fixed to the side-member at an intermediate portion next to the powertrain unit; the safety device is further provided with a pin, which is fixed with respect to the second end of the beam and projects from said second end through a hole of the intermediate portion towards the powertrain unit.